Choose True or False. If False, choose the statement that makes it True. An electromagnetic wave is a longitudinal wave that is formed when electric charges vibrate and travel through space, where there is no matter.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.